6 Fine Blue bluRAFIA Schmidt 888 Ceramic Rollerball Refills Refill has 0.6mm ceramic ball for smooth writing, size (F) Fine point. Measures 4 3/8" in length, please see the exact measurements and compare to yours. Offer in 3 colors (black, blue & red), check our other listings for different quantity and color combination. Fits 98% of rollerball pens which accept European standard size refills. Made in Germany. Try ours, odds are that your branded refill and ours were made by the same manufacturer.